diff --git a/lua/lazy/core/config.lua b/lua/lazy/core/config.lua
index ed1009d..ccad780 100644
--- a/lua/lazy/core/config.lua
+++ b/lua/lazy/core/config.lua
@@ -17,7 +17,7 @@ M.defaults = {
   -- leave nil when passing the spec as the first argument to setup()
   spec = nil, ---@type LazySpec
   lockfile = vim.fn.stdpath("config") .. "/lazy-lock.json", -- lockfile generated after running update.
-  concurrency = nil, ---@type number limit the maximum amount of concurrent tasks
+  concurrency = jit.os:find("Windows") and (vim.loop.available_parallelism() * 2) or nil, ---@type number limit the maximum amount of concurrent tasks
   git = {
     -- defaults for the `Lazy log` command
     -- log = { "-10" }, -- show the last 10 commits